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    <title>Title</title>
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<a href="./demo01.do?action=servletContext">操作 ServletContext 属性</a><br/>
<a href="./demo01.do?action=session">操作 Session 属性</a><br/>
<a href="./demo01.do?action=request">操作 Request 属性</a><br/>
<a href="./demo01.do?action=addPersonToSession">把Person对象添加到Session中</a><br/>
<a href="./demo01.do?action=removePersonFromSession">把Person对象移除出Session中</a><br/>
<a href="./demo01.do?action=addStudentToSession">把Student对象添加到Session中</a><br/>
<a href="./demo01.do?action=getStudentFromSession">把Student对象从Session中获取</a><br/>
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